Frederick j



' Patented Feb. 24 1885.

IN VENTOR NESSBS:

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UNITED STATES PATENT CrEioE.

FREDERICK J. HOYT, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR, BY'MESNEASSIGNMENTS, TO THE CRESCENT COMBINATION PAVEMENT COMPANY,

OF SAME PLACE. V

PAVlNG-BLOCK FOR STREETS.

SPECIFICATION forming part of Letters Patent N0.312,639, dated February24, 1885.

Application filed August 29, 1884.

T rtZZ whom it may concern.-

Be it known that I, FREDERICK J. How, a citizen of the United States,residing at the city of Grand Rapids, in the county of Kent and State ofMichigan, have invented certain new and useful Improvements inStreet-Pavements, of which the following is a specification.

My invention relates to a new and improved paving-block for stree'ts,soconstructed as to produce a smooth and durable road when laid in place,which are its two principal objects. I attain these objects by themechanism illustrated in the accompanying drawings, in which Figure 1 isa perspective view of a shell or hollow block which I design for apavingblock. Fig. 2 is a perspective view of the same block filled withwood, cement, or other suitable material and Fig. 3 is a skeleton 2oblock designed for the same purpose.

Similar letters refer to similar parts throughout the several views.

A A are the sides and end of the shell, and E is the arched part whichrests on the bed or foundation.

B is the filling of the shell. This filling will be of differentmaterials, depending upon the kind of pavement required. For ordinarystreet or road pavement I deem cement or 0 wood a good filling. For anoiseless pavement india-rubber or other elastic filling may be used.

Instead of making atight box or case, as shown in Fig. 1, I design,also, to make a 3 5 skeleton case open at the bottom, as shown in Fig.3, having supporting-bars d d, and also in some cases to do away withoneof the long sides A entirely, as the case will be sufficiently strongwhen placed in the pavement,

each paving-shell helping to support the other, and my intention beingto make the shell sufficiently strong to hold the filling and to with-(No model.)

I stand the weight and concussion of the carriage-wheels, and at thesame time to cut away such portions of the shell as I may be able to 5Without weakening the same.

The shell when made may be filled before being placed into thestreet-pavement, or the shells may be first laid and then filled. Theshell should be of metal, cast-iron being pref- 5o erable on account ofcheapness and durability.

The road-bed may be of sand, gravel, or similar material, so that when-the shell is pressed down the arch E will be filled, thereby supportingthe pavement. The arched or 5 5 curved form of the block or shell willprevent the gravel or earth from packing under either end of the same,as is the case withpavingblocks having straight under surfaces and thisform may be applied to stone or wooden 6o paving-blocks with greatadvantage and I do not wish to limit this part of my invention to afilled pavingblock.

I am aware that iron boxes or shells filled with concrete for pavingpurposes are old.

Having thus described my invention, what I claim to have invented, anddesire to secure by Letters Patent, is I 1. A paving block or shellprovided with an arched under face, E, extending under the entiresurface of the block, so as to produce at the two ends of the archknife-like edges, whereby the block may be pressed into the road-bed andover the packing within the arch and the packing of the bed beneath, the7 5 block prevented, substantially as described.

2. Themetallic shell A A, whether whole or in skeleton form, providedwith the arched under face, E, and filled with any suitable filling, B,substantially as described.

FREDERICK J. HOYT.

Witnesses:

FRED W. STEvENs, EDWARD TA'GGART.

